Cloning and expression of the Escherichia coli rho gene in a plasmid vector

In order to further elucidate the role of Rho protein on transcription termination and cells growth control, we have subcloned by two steps the rho+ structural gene of Escherichia coli from Lambda rho+524 into a plasmid vector. The resulting plasmid pEG25 contains a 2.9 kbp insert which is able to complement several different rho mutations and to express a functional Rho protein in U.V. irradiated maxicells.